I built an alternative[0] that takes a proof of work approach. As a site owner you set the difficulty that makes sense for you: so perhaps you would want 20 seconds of computation before you can submit. The nice thing is that this can happen entirely in the background while the user fills in the form.
Also with multiple requests from the same IP in a short timespan, the difficulty increases.
There are downsides to to any captcha, but in my opinion make a much better tradeoff. Accessibility and privacy are respected, and there are no annoying tasks.
Also with multiple requests from the same IP in a short timespan, the difficulty increases.
There are downsides to to any captcha, but in my opinion make a much better tradeoff. Accessibility and privacy are respected, and there are no annoying tasks.
[0]: https://friendlycaptcha.com